102results about How to "Simple structure processing" patented technology

The invention discloses a dual-band co-aperture flat array antenna which is applied to multiband homing heads and intelligent ammunition guidance systems. The dual-band co-aperture flat array antenna comprises a single-ridge waveguide slot array surface, a substrate integrated waveguide slot array surface, single-ridge waveguide slot array feed networks and a substrate integrated waveguide slot array feed network. The single-ridge waveguide radiation slot array surface comprises a plurality of rows of parallel single-ridge waveguide radiation slot line arrays; a substrate integrated waveguide radiation slot array comprises a plurality of rows of parallel substrate integrated waveguide radiation slot line arrays; an antenna array surface is divided into four quadrants; the feed networks respectively feed array surfaces of the four quadrants so as to have the condition of realizing a single-pulse function; each quadrant has two sets of feed networks for respectively feeding the single-ridge waveguide slot line arrays and the substrate integrated waveguide slot line arrays; the single-ridge waveguide slot array surface works in an X-band; the substrate integrated waveguide slot array surface works in a Ka-band; arrays of two forms have a common aperture and do not mutually affect; and the problem of electromagnetic wave blocking caused by non-coplanar array surfaces is solved.

The invention discloses a nano fiber artificial blood vessel for catalyzing and releasing nitric oxide and a preparation method. The artificial blood vessel consists of a three-dimensional reticular non-woven film pipe structure formed by an inner layer and an outer layer of nano fibers. The artificial blood vessel is prepared by the following method comprising the following steps of: dissolving gelatin in glacial acetic acid to prepare a solution; adding a sodium heparin aqueous solution to prepare a spinning dope for electrostatic spinning to form nano fiber non-woven film pipes; dissolving polyurethane and nantokite chelate in a mixed solution of tetrahydrofuran and N,N-dimethyl fomamide to prepare a polyurethane spinning dope; carrying out electrostatic spinning to continue collecting polyurethane fibers on a collecting roller with the nano fiber non-woven film pipes so as to form polyurethane fiber non-woven film pipes; and soaking and treating the polyurethane fiber non-woven film pipes in an aqueous solution of a crosslinking agent. The artificial blood vessel can catalyze and release nitric oxide for a long time in vivo and in vitro and is beneficial to inhibiting the aggregation of platelets. The preparation method is simple, and the crosslinking degree is easy to control.

The invention discloses a radar collision triggering assembly and a cleaning robot. The radar collision triggering assembly comprises a radar driving board, a triggering button circuit board, a radar,an upper housing, a radar support, an elastic collision piece, a rotating shaft and a rotating shaft support; on the top surface of the upper housing, the rotating shaft support and the elastic collision piece are installed on the corresponding side faces of a radar mounting groove respectively, the triggering button circuit board is mounted on the back surface of the upper housing, a triggeringthrough hole runs through the middle of a button mounting groove and the top surface of the upper housing, and the edge of the radar support is provided with a squeezing bone site; the rotating shaftpenetrates through the rotating shaft support and the radar support, the elastic collision piece is assembled in an elastic collision piece mounting groove, and when the radar support is not hit by anexternal object, the elastic collision piece is used for controlling the squeezing bone site to suspend over the top surface of the upper housing through the radar support; when the radar support ishit by an external object, the radar support rotates around the axis of the rotating shaft, so that the squeezing bone site penetrates through the triggering through hole to squeeze a button contact on the triggering button circuit board.

The invention relates to the technical field of sound absorption, in particular relates to a controllable sound absorption structure. The controllable sound absorption structure comprises a base body and a piezoelectric film fixedly arranged on the base body, wherein a cavity is formed between the base body and the piezoelectric film; a plurality of penetrating sound absorption holes are formed in the piezoelectric film; a noise frequency collection element is used for acquiring the frequency of environmental noise; a voltage modulation circuit is electrically connected with the piezoelectric film through a lead wire; the signal receiving port of the voltage modulation circuit is connected with the signal output port of a noise frequency collection element so as to apply excitation voltage to the piezoelectric film. Compared with the prior art, the controllable sound absorption structure has the advantages that in the working process, the voltage modulation circuit can apply an excitation electric field to the piezoelectric film, so that the apertures of the sound absorption holes in the piezoelectric film are correspondingly changed, and the controllable active sound absorption performance of the sound absorption structure to noise with different frequencies is realized; therefore, the effective sound absorption frequency band of the sound absorption structure is expanded. Compared with the prior art, the controllable sound absorption structure has the characteristics of high easiness in structural processing, low production cost and outstanding sound absorption effect.

The invention discloses a topological optimization design method of a submarine cable bending protector. The topological optimization design method comprises the following steps: establishing an initial three-dimensional model of the submarine cable bending protector; importing the initial three-dimensional model into an OptiStrut module of the HyperMesh software; meshing the initial three-dimensional model and defining material attributes of the initial three-dimensional model; performing topological optimization design on the three-dimensional model of the submarine cable bending protector;determining three load sets and two working conditions are created, loads and constraints of the load sets, and defining topological optimization design variables; selecting a topological optimizationmodel component to contain all design attributes in the initial three-dimensional model, defining a mass fraction lower limit value and an objective function of the initial three-dimensional model asminimum strain energy, and performing iterative optimization and calculation solution on the density of the submarine cable bending protector; and comparing the two-dimensional topological optimization design result with the three-dimensional topological optimization design result to verify the accuracy of the three-dimensional topological optimization design result.

The invention discloses a low-pass filter with a changeable cavity width, and the filter comprises a base with a metal cavity, a cover plate which is arranged on the base, metal wires, insulating materials and at least three metal sheets which are arranged in the metal cavity; the metal sheets are connected together through the metal wires and are insulated from the metal cavity through the insulating materials; the cross section of the metal cavity is in a rectangular shape; the transverse section of the inner side wall of the metal cavity is in a rectangular wave shape; both end surfaces of the metal sheets are in the crest of the rectangular wave. The low-pass filter with the changeable cavity width has the advantages of simplicity in structure processing, convenience in debugging and high pass-band cut-off frequency, and is expected to be widely applied to electronic systems in various microwave bands, particularly radar, missile guidance, communication and other military and civilian fields.

The invention discloses a hydraulic oil cylinder which comprises a rod cavity end closure, a cylinder barrel, a piston rod, a piston and a rodless cavity end closure, wherein the inner chamber of the hydraulic cylinder barrel is divided into a rod cavity and a rodless cavity by the piston rod and the piston; the piston rod is provided with a buffering sleeve which comprises a first buffering sleeve and/or a second buffering sleeve; the buffering sleeve can slide along the axial direction of the piston rod; an axial throttling oil passage is arranged between the buffering sleeve and the piston rod; the first buffering sleeve is provided with a sealing end surface; a sealing end surface is arranged on the rod cavity end closure; hydraulic oil in the rod cavity is discharged to an oil passage through the throttling oil passage; the end surface of the second buffering sleeve is in contact with the sealing end surface of the rodless cavity end closure to form a sealing; and the hydraulic oil in the rodless cavity is discharged to the oil passage through the throttling oil passage. The invention provides a buffering mechanism of the hydraulic oil cylinder; and the buffering mechanism has longer service life, has lower requirement on the accuracy of manufacturing and is convenient for organizing production.

The invention discloses a novel cylindrical roller bearing of a holder structure. The novel cylindrical roller bearing is composed of an inner ring, an outer ring, holder rollers, lateral plates, bolts, a rolling body, shaft pins and the like. A holder connects the holder roller with the two lateral plates by the shaft pins, and therefore rolling body separating and motion guiding of the rolling body are achieved. The rolling structure is adopted for the holder, sliding friction between the holder and the rolling body is converted into rolling friction, abrasion of the holder and the rolling body is reduced, and stability of moving of the holder is improved. The holder structure is simple in processing, is convenient to mount and is reliable is performance, and application in situations needing thigh impulse load bearing is achieved.

The invention provides a support capable of adjusting the elevation. The support comprises an upper pedestal, a self-locking adjusting mechanism, a jacking mechanism and a lower pedestal; the self-locking adjusting mechanism and the jacking mechanism are both located between the upper pedestal and the lower pedestal; a fixed step part is arranged at the bottom of the upper pedestal, and the self-locking adjusting mechanism comprises an adjusting rod and a movable step block matched with the fixed step part; and the movable step block is arranged on the adjusting rod in a sliding mode. Through the jacking mechanism and the self-locking adjusting mechanism, elevation adjustment and self-locking of the support are achieved, and the overall service life of the support can be prolonged; and self-locking is carried out through the movable step block, relative sliding is not likely to happen between the fixed step part and the movable step block, and the self-locking reliability is high.

The invention provides a downward-opening type positioning device for a segmented mold arch seat. The positioning device comprises arch seats, wherein the arch seats are arranged at the lower part of an upper cover plate; inner positioning blocks and outer positioning blocks are arranged on the circumference of the upper cover plate and are arranged in a staggered manner; a groove matched with the inner positioning block is arranged at the middle part of the upper end of each arch seat; and each arch seat is arranged between two outer positioning blocks on the upper cover plate. The downward-opening type positioning device for the segmented mold arch seat is characterized in that each arch seat is co-positioned by an inner positioning block in the middle part and two outer positioning blocks at two sides and is not easy to move. With the downward-opening type positioning device, the problem of positioning of a segmented mold arch seat of an engineering giant wheel can be effectively solved; and meanwhile, the problems that an engineering giant tyre is thick in local rubber side and broken in figures are solved and the appearance quality of the tyre is improved. The downward-opening type positioning device with the structure is simple in processing and convenient in operation. Experiments demonstrate that the downward-opening type positioning device with the structure has the characteristics that quality tire in which the problems that the engineering giant tyre is thick in local rubber side and broken in figures exist are greatly reduced, the waste is reduced and remarkable economic benefits are obtained.

The invention relates to the field of street lamps, in particular to an irradiation angle-adjustable microwave ion street lamp and a realization method. The irradiation angle-adjustable microwave ion street lamp comprises a stop device, an angle adjusting bracket, a microwave plasma lamp body fixed at the bottom of the angle adjusting bracket, and an angle adjusting sleeve; through holes and rotating shaft screw holes are symmetrically formed in two sides of the angle adjusting bracket; a stop screw hole and a rotating shaft are arranged on the angle adjusting sleeve; two sides of a rotating shaft are embedded in the rotating shaft screw holes in two sides of the angle adjusting bracket; and the stop device penetrates through the through holes and the stop screw hole, and is fixed on the angle adjusting bracket for stop positioning. The irradiation angle-adjustable microwave ion street lamp and the realization method, disclosed by the invention, use a differential principle for improving the level number of adjustable angle of the street lamp, effectively reduce the number of the holes when guaranteeing reliable fixation, and reduce the size of the microwave ion street lamp corresponding to use of a gear.

The invention discloses an electrical contact assembly with a groove, which comprises a contact bridge and an electrical contact arranged on the contact bridge, the surface of the contact bridge facing the electrical contact is provided with the groove, the groove is arranged close to the intersection of the contact bridge and the electrical contact, and solder formed by welding is filled betweenthe groove and the edge of the electrical contact. The invention has the following advantages and effects: the design mode breaks through the conventional design thought of the existing electrical contact element, the change of the structure of the contact bridge product is adopted to limit the solder from climbing to the working surface of the electrical contact, and extra cost is not required tobe increased. The whole structure is easy to machine, accurate, effective and high in efficiency, and the finished product rate of products is increased.

The invention discloses a thermal expansion valve with a unidirectional control function. The thermal expansion valve comprises a valve body having an inlet passage and an outlet passage, a temperature sensing part disposed at one end of the valve body, and a first spool part disposed in an inner cavity of the valve body. The first spool part comprises a valve stem and a first spool; the valve stem is abutted to the temperature sensing part; the first spool coordinates with a first valve port in the inner cavity to control the quantity of medium fluid flowing from the inlet passage to the outlet passage. The valve body further comprises an accommodating portion extending from the inlet passage to the inside of the valve body. The accommodating portion is provided with a second valve port. A second spool part is disposed in the accommodating portion. A limit pin used for limiting an opening position of the second spool part is further disposed in the accommodating portion. When the medium flows from the inlet passage to the outlet passage, the second valve port is closed; when the medium flows from the outlet passage to the inlet passage, the second valve port opens. Compared with the prior art, the thermal expansion valve has the advantages that the influence upon flow capacity of the unidirectional valve is effectively decreased on the premise of improving manufacturability.

The invention discloses an engine cylinder gasket sealing structure. The engine cylinder gasket sealing structure comprises an air cylinder body and an air cylinder cover arranged on the air cylinderbody, wherein an air cylinder sleeve is arranged in the air cylinder body. The engine cylinder gasket sealing structure is characterized by comprising the air cylinder sleeve, wherein the air cylindersleeve is arranged between the air cylinder body and the air cylinder cover, a support boss is arranged on the inner wall of the air cylinder body, a support shoulder is arranged on the outer wall ofthe air cylinder sleeve, the support shoulder is abutted against the support boss, a boss and a compression bulge are arranged on the upper surface of the support shoulder, a groove is formed betweenthe boss and the compression bulge, the compression bulge and the air cylinder sleeve are in interference fit, and the upper surface of the periphery of the air cylinder body is flush with the edge of the upper surface of the compression bulge. The engine cylinder gasket sealing structure has the advantages that a cylinder gasket is of a structure simple to process and low in cost. The engine cylinder gasket sealing structure forms a whole circle of linear sealing structure, and not only is strong in sealing reliability, but also can effectively reduce sealing stress generated duet to compression. The engine cylinder gasket sealing structure solves problems of acting points of sealing force after the engine cylinder gasket sealing structure is assembled, and prevents that the deformationamount of the air cylinder sleeve is overlarge.

The invention discloses a low-pass filter based on a helical metal wire. The low-pass filter based on the helical metal wire comprises a base provided with a metal cavity, and a cover plate arranged on the base, and further comprises a metal wire, insulating materials and at least three metal plates disposed in the metal cavity. The metal plates are connected with one another through the metal wire, and the metal plates are insulated from the metal cavity through the insulating materials, and a portion of the metal wire between two adjacent metal plates is in a helical shape. The low-pass filter based on the helical metal wire has the advantages of being simple in structural processing, convenient to debug, and high in pass band cut-off frequency. The low-pass filter based on the helical metal wire is expected to be widely used in electronic systems of various microwave bands, especially in military and civil fields such as radar, missile guidance, communication and the like.

The invention provides an automatic self-aligning labyrinth type belt rubber composite dustproof cover. The automatic self-aligning labyrinth type belt rubber composite dustproof cover comprises an inner sleeve dustproof cover and an outer sleeve dustproof cover, wherein the inner sleeve dustproof cover comprises a first skeleton and a first multi-lip sealing part, the outer sleeve dustproof covercomprises a second skeleton and a second multi-lip sealing part, an inner ring of the first skeleton is tightly matched with an inner ring of a bearing, the outer wall of an outer ring of the first skeleton is provided with the first multi-lip sealing part, and the first multi-lip sealing part is in interference fit with the outer ring of the second skeleton; and the outer ring of the second skeleton is closely matched with an outer ring of the bearing, the outer wall of the inner ring of the second skeleton is provided with the second multi-lip sealing part, and the second multi-lip sealingpart is in interference fit with the inner ring of the first skeleton. A sealing space can be formed between the dustproof covers, so that grease in the bearing is not prone to overflowing, external severe pollutants and dust are difficultly intruded into the interior of the bearing, and the service life of the bearing in the heavy pollutant environment is greatly prolonged.